According to the manufacturer, Tectum Roof Decks are an ideal noise reduction solution for large, high traffic, exposed structure spaces such as auditoriums, gymnasiums, arenas, pools, ice arenas and multi-use facilities. Tectum Roof Deck panels also help meet ANSI S12.60 Acoustical Performance Criteria for learning spaces such as gymnasiums.

Tectum Roof Decks are composed of rapidly renewable and FSC-certified aspen wood fiber that is bonded with an inorganic hydraulic cement for maximum durability and performance. Tectum 1 (non-composite panels) meet the most stringent sustainability criteria, including EPD, HPD, and Declare, and contribute favorably to LEED v4, and the Living Building Challenge.

Tectum Roof Deck solutions in plank or tile configurations are available in a wide variety of system configurations to address a building’s design requirements in low-slope applications and are compatible with virtually all roofing materials, providing a thermal barrier for field-applied foam plastics.

Tectum Composite Roof Deck panels are typically used in sloped applications where acoustics, insulation, a nailable surface, and structural integrity are all important. An NRC up to 0.80 provides predictable acoustics, often eliminating the need for additional noise reducing materials.

The Vaughan Metropolitan Centre Subway Station is one of six new subway facilities near Toronto. Photos: Rheinzink

The new Vaughan Metropolitan Centre Subway Stationis truly an artistic jewel on Toronto Transit Commission’s (TTC) Spadina Subway Extension. One of six new facilities on the route, the station offers intermodal transit services and rapid subway connection to downtown Toronto.

The curvilinear design of the main entrance pavilion creates a futuristic appearance for the structure. The design offers a column-free interior environment with high ceilings and bright open spaces that allow daylight to penetrate deeply into the station.

Highlighting the exterior design is a standing seam roof that brings the structure to life. Approximately 12,000 square feet of Rheinzink Classic bright rolledpanels clad the curved roof of the impressive building. The roof offers high solar reflectance and combines with significant sustainable initiatives throughout the project. The station exceeds Canada’s National Energy Code requirements for energy performance by 40 percent and meets sustainability standards comparable to those required for LEED Silver certification.

Approximately 12,000 square feet of zinc panels clad the curved roof of the station, which exceeds Canada’s National Energy Code requirements for energy performance by 40 percent. Photos: Rheinzink

More than 1,000 uniquely tapered panels were fabricated by Rheinzink distributor Agway Metals Inc. at its facility in Exeter, Ontario. “No two panels are alike,” says Paul MacGregor, estimator. “Each panel had an individual taper and length. We fabricated the panels using our CNC turret, which was key to achieving the exact taper for each panel right down to the millimeter.”

Providing precise panel specifications to Agway Metals was the installer, Bothwell-Accurate, of Mississauga, Ontario. It was a demanding process, according to Trevor McGrath, Bothwell’s estimating manager for cladding. “We used a 3-D scanner on the roof structure and then utilized Radius TrackCorporation to design the curved framing system that went on top of the roof structure,” McGrath notes. “The Rheinzink panels were thenapplied on that. Radius Track confirmed the skin model of the 3-D structure for us and then computer-flattened it so that we could begin doing sheet design and layout. The flattened model gave us critical dimensions regarding panel lengths and widths.”

The panels were curved on site by Bothwell-Accurate using Agway’s Schlebach machine. “We did a sheet stagger at the beginning of the installation with the two panel lengths, which then allowed us to stagger all of the joints which is recommended,” McGrath says.

Bothwell-Accurate has considerable experience in installing zinc.“We’re very familiar with how to form and work with the natural metal,” McGrath states. “The architects wanted an ‘old school’ appearance with hammered seams and the manner in which the flashings and counter-flashings were done. There was a painstaking amount of detailing done around the 46 skylights in the roof. Each one required custom attention. We had productions crews on the job getting the panels down and then finishing crews crafting the detail work.”

The curvilinear design of the main entrance is capped with a standing seam roof comprised of zinc panels from Rheinzink. Photos: Rheinzink

Design for the station was a collaboration of Grimshaw Architectsand Adamson Associates Architectsin conjunction with ARUP Canada.

Goals of the Vaughan Metropolitan Centre included encouraging greater use of public transportation, facilitating efficient transfers between modes of transportation, as well as creating an interesting aesthetic experience. The domed entrance pavilion integrates a mirrored ceiling art installation by Paul Raff Studio designed tocapture the drama of moving passengers and changing light conditions.

Juan Porral, partner at Grimshaw Architects, summed it up this way: “We are always looking for opportunity to create high-quality places with real character. By elevating a functional building to something artful and full of life that people will remember and enjoy, we can have a greater impact on urban space and user experience.”

GreenSlope is a roof leveling compound that helps eliminate ponding water on flat rooftops by filling in low areas, returning the roof to its original slope to achieve positive water flow to desired drainage areas. Following advanced in-house innovation and successful market testing, GreenSlope has been re-engineered for 2018 and now ships with a new and improved formula.

GreenSlope’s new formula features an improved adhesive, dramatically shortening the curation period from 24 hours to 2 hours, which allows for same-day topcoating. GreenSlope has also upgraded to finer-grade EPDM granules, which are less porous, easier to work with, and offer superior UV resistance and longevity. GreenSlope’s robust adhesive forms an exceptional bond with a wide variety of roof systems including single-ply, modified bitumen/BUR, metal and foam roof systems. The cured material is similar to a professional running track or premium playground surface, able to withstand extreme climates and as well as foot traffic.

At 20 percent the weight of concrete alternatives and half the weight of ponding water, GreenSlope reduces stress on the roof system by facilitating proper water drainage to extend the lifespan of the roof at a fraction of the time and cost it takes to install a new drain or tapered insulation. GreenSlope’s UV-stable compound can endure frequent freeze/thaw cycles and resists wear and tear while remaining flexible to absorb surface stresses. Highly malleable, GreenSlope can be used in a wide variety of practical scenarios including around low drains and scuppers, as walk pads and pitch-pan filler, for protection around curbs, HVAC units and more.

The product can be easily applied over low areas using a trowel and straightedge to smooth and level. For best results, additional topcoat application is recommended to achieve reliable waterproofing and match the aesthetics of the existing roof. GreenSlope is compatible with most topcoats including white acrylic, aluminum mastic, modified mastic, elastomerics, emulsions, and membranes.

The problem of ponding water offers service divisions an opportunity to open new doors with prospective clients. Ponding water can be found on eight out of 10 flat roofs and is one of the most commonly reported concerns of contractors and building owners as it can cause leaks, structural damage, membrane damage, algae and mold growth, slip hazards, insect problems, voided warranties, and premature failure of roof systems. Conventional options to deal with ponding include installing a new inner drain or adding tapered insulation, but these options are often expensive for building owners and not always necessary. GreenSlope’s preventative approach helps building owners maintain their roof asset while maximizing rooftop ROI. Additionally, going green offers potential LEED credits.

GreenSlope is manufactured and distributed by United Asphalt.

LEARN MORE

The “Roofers’ Choice” winner is determined by the product that receives the most reader inquiries from the “Materials & Gadgets” section in a previous issue. This product received the most inquiries from our September/October 2017 issue.

Nearly 13,000 square feet of Petersen’s Galvalume Snap-Clad panels was used to clad the roof.

As many architects can attest, designing a residence for oneself can present challenges. But architect Jack Carson rose to the occasion by creating a striking design for his new home, located on a ranch in the beautiful Texas Hill Country. Design for the 7,000-square-foot residence follows LEED principles and blends a unique palette of “industrial” materials with ultra-modern aesthetics.

“The house is truly on a ranch. We have cattle on the property,” says Carson, president of Carson Design Associates in Austin, Texas. “We wanted to keep the design somewhat in the ranch vernacular but with a contemporary look. The reliance on metal for the roof and cladding and an exposed structure helped create a ranch building feel. We like to think of it as an ‘industrial ranch’ aesthetic.”

The primary wall panel profile utilized was Petersen’s Precision Series panels, of which 2,400 square feet of the 16-inch Galvalume material was installed.

Several of Petersen Aluminum’s PAC-CLAD profiles contributed to Carson’s success in delivering the desired look. Nearly 13,000 square feet of Petersen’s Galvalume Snap-Clad panels was used to clad the roof. The 16-inch roof panels were rollformed onsite because of extremely tight site conditions and because the only access to the site was via a dirt road that wasn’t wide enough to allow large trucks to deliver factory-formed panels. An additional 3,000 square feet of Snap-Clad panels also was installed vertically as siding around two garages and at specific locations on the house as accent panels.

The primary wall panel profile utilized was Petersen’s Precision Series panels, of which 2,400 square feet of the 16-inch Galvalume material was installed. All wall panels were manufactured at Petersen’s Tyler, Texas, plant.

The underside of the overhanging soffit is clad with Ipe wood that ends with an edge that Carson and Brown describe as “the wing” or “the blade.”

The onsite fabrication of the roof panels and the installation of all roof and wall panels was performed by Dean Contracting Co., Kyle, Texas. “The greatest challenge was executing the architects dream for his home,” recalls Jesse Brown, vice president of Dean Contracting. “The design included a myriad of varying geometric shapes on many different planes and a blend of materials that required complex detailing. It was probably one of the top-five most challenging jobs that we have ever done.”

The Petersen profiles highlight the material palette, which also includes Texas limestone sourced directly from the property on which the home sits, Ipe wood, steel beams and a generous amount of glass. “We have great views into the valley with no neighbors,” Carson adds. “A large overhanging soffit covers a large portion of the deck and shades all of the glass.”

The underside of the overhanging soffit is clad with Ipe wood that ends with an edge that Carson and Brown describe as “the wing” or “the blade.” Fabricated with Alcoa Reynobond aluminum composite material (ACM), this transitional element smoothly links the standing-seam roof with the overhanging wood-clad soffit. Petersen functioned as distributor of the Reynobond ACM.

The decision to use Petersen for the roof and siding was arrived at rather easily. Carson notes: “I was familiar with PAC-CLAD and wanted to use it but also wanted to rely on the builder’s recommendations regarding materials and subcontractors. In our very first meeting with the roofer, Dean Contracting, they brought in samples of PAC-CLAD and recommended using it. That made the decision pretty easy.”

Carson is a big believer in metal as a roofing and cladding material. “We wanted to be as maintenance-free as possible. And sustainability was an important component as well,” Carson says. “We used LEED principles in our design. Metal is far greener than asphalt shingles and other alternatives. It’s just a great option for residential construction.”

The installation went smoothly, Carson adds, primarily because he relied on the expertise of Dean Contracting. “My approach is to listen to the experts. Jesse Brown and his crew worked out the complex detailing. They use metal all the time and are extremely capable. We collaborated as necessary but I basically left it in their hands.”

The Petersen profiles highlight the material palette, which also includes Texas limestone sourced directly from the property on which the home sits, Ipe wood, steel beams and a generous amount of glass.

Brown was quick to give full credit to the crew that was led by Juan Rojas, sheet-metal superintendent. Rojas is a 24-year employee of Dean Contracting and Brown cites Rojas’ attention to function and precise detailing as a main reason why the job turned out so well.

The house—in spite of its size and location in the hot Texas climate and the large amount of glass—is energy efficient. Two inches of rigid insulation was installed under the metal roof and an additional 4 inches of sprayed insulation went under the roof deck. “The heavy insulation and the shade provided by the overhang makes it very energy efficient. The house stays a very constant temperature,” Carson says.

The entire property captures rainwater in 18,000-gallon collection tanks, which is yet another reason for using metal, Carson points out.

When asked about the challenge of designing for yourself, Carson thought it was easier than designing for a traditional client. “I was probably more demanding in ‘getting it right’, but once I knew I had the right design and materials, I didn’t have to convince myself that it was the best direction. There was no negotiation or comprising the design in any way,” Carson says. “The biggest problem any architect has in designing for themselves is in ‘editing out.’ We know all of the possibilities, and being able to prioritize and filter out the unnecessary options is often the hardest challenge.”

Mark Bus, national sales manager of ATAS International, received a Metal Construction Association Triumph Award at METALCON in Baltimore. He was recognized as being someone who demonstrates excellence, creativity and initiative in his or her business or profession.

Jim Bush, vice president of Sales and Marketing states, “I have had the pleasure of watching Mark mature over the years to a young and emerging professional; not only within ATAS but also in the industry. He has earned the respect of the ATAS sales team, as well as peers and management, through hard work and a sound decision making process. Mark is also aware of industry initiatives and association activities and brings those into daily communications with staff and customers.”

An ATAS distributor, Allan Brock of Brock Associates, says, “During my forty year tenure in the commercial metal roofing and siding industry, I have rarely crossed paths with a young professional like Mark Bus. I have seen Mark evolve from an inside technical sales person, to a regional product representative, to management. At each level, he radiated professionalism along with product and technical knowledge. It’s been a pleasure dealing with an individual as capable as Mark.”

Robert J. Bailey, AIA, CSI, CCS, LEED AP, specifications and constructability specialist with IKM Inc., also recommended Mark Bus for this award. “Mark makes it a point to understand the people who are specifying and purchasing ATAS products. As a new product rep in western Pennsylvania, he became involved in various CSI (Construction Specifications Institute) chapters. It was clear to me that Mark knew in order to be prepared for a leadership role in ATAS, he first needed to understand the industry itself and establish important contacts and relationships there. Mark is an example for other young sales professionals.”

To satisfy new LEED certification requirements for green building construction, Kemper System America Inc. is developing both Environmental Product Declarations (EPDs) and Health Product Declarations (HPDs) for liquid-applied roofing and waterproofing products.

The latest version of the Leadership in Energy and Environmental Design (LEED) rating system, LEED v4, includes two new transparency elements for Building Product Disclosure and Optimization which can contribute up to four points towards a certification:

“Environmental Product Declarations” credits require the use of materials that meet EPD or similar disclosure criteria.

To help customers obtain these new LEED certification points, Kemper System is planning to develop EPDs for products beginning in 2017 and issue upon completion; and to issue HPDs for all relevant products by the end of 2017.

Since the LEED rating system was developed by the U.S. Green Building Council in 1994, it has become a standard in green building certification, and it has adapted to meet the demands of building owners and regulators for transparency and sustainability.

The new LEED v4 Exam Preparation Package from education leaders GBRI (Green Building Research Institute) is an innovative way for green building professionals, architects and engineers to earn their LEED credential, signifying their in-depth knowledge of the LEED rating system, building codes and standards. The GBRI approach to LEED education allows green building professionals to earn their USGBC LEED Credential quickly and easily: using the live online, in-person and online on-demand learning modules, professionals can achieve their LEED credential in as little as four weeks. “Having worked in the field ourselves for decades, we get it. It’s no easy task to make time for exam preparation: professionals today need the online, on-demand and in-person flexibility that our courses offer,” commented Kayla Gerstenberg, director of education.

There is no pre-requisite necessary to take the LEED exam; the all-inclusive LEED v4 Exam Preparation Package includes everything professionals need to study for and pass the exam successfully. The package includes a study guide, online learning modules, and comprehensive practice exams with over 500 test questions (and explanations for each question). Offered online, online on-demand, and in-person, the course caters to many different learning styles and time schedules. Materials such as MP3 audio files, flash cards designed for studying on-the-go and memory charts are made available to aid the learning process. As GBRI boasts a large network of highly qualified instructors, courses are offered at locations throughout the United States and the world – from Vermont to Dubai.

Professionals can select from numerous specialties within the LEED credential: LEED Green Associate (GA), LEED AP Building Design + Construction (BD + C) and LEED AP Operations + Maintenance (O+M). Courses start at $199, and once signed up, students gain instant access so they can begin working toward their LEED credential immediately. To register or access more information about the online and on-demand online package, click here.

Mount Carmel New Albany, New Albany, Ohio

Team

Roofing Contractor: Smith Roofing, Columbus, Ohio

Bellaforté Slate composite roofing in Smokey Gray was installed on the 117,668-square-foot hospital.

Roof Materials

Bellaforté Slate composite roofing in Smokey Gray was installed on the 117,668-square-foot hospital. The composite roofing has achieved a Class A Fire Rating in the ASTME E 108 fire test and withstands straight-line winds up to 110 mph in the ASTM D 3161 test. The roof tiles also resist impact, severe weather conditions and wind-driven rain. Bellaforté Slate tiles not only add safety to the structure, they also add aesthetic appeal.

MBMA partnered with UL Environment (ULE) to develop and certify these EPDs, which summarize the cradle-to-gate environmental impacts of a metal building system. The cradle-to-gate method is used to describe the impact of producing products, from raw material extraction, through processing, fabrication and up to the finished product leaving the manufacturing facility.

EPDs provide specifiers, builders and other industry professionals with transparent third-party documentation of the environmental impacts of products, including global warming potential, ozone depletion, acidification and other factors. The LEED V4 green building rating system encourages the use of EPDs, which are important for earning credits in the program.

MBMA has been studying the sustainable attributes of metal buildings for several years, starting with the collection of the industry’s LCI data, and using it to perform whole-building LCA analysis to compare its products to other forms of construction. Through these studies, MBMA has shown that the structural efficiency of metal building systems is a key contributor to their sustainable performance when compared to conventional construction.

“There is a growing need to simplify and harmonize the decision-making processes for architects and specifiers that must choose building materials for construction,” says Dan Walker, associate general manager of MBMA. “MBMA members are dedicated to educating others about the sustainable performance of metal building systems, and these EPDs will effectively do that for the design community.”

Metal building systems are custom-engineered and fabricated in accordance with strict quality assurance standards, and with almost no scrap generated. Designers are beginning to realize that the structural efficiency of this approach brings tangible benefits, from a sustainability and cost-savings perspective. The completion of these EPDs gives designers the confidence that they are making a wise choice from financial and environmental aspects.

The white paper explores the role of reflective roof coatings in the Washington-based U.S. Green Building Council’s LEED Version 4 green-building program with emphasis on new building structure, existing building operation and maintenance, and LEED v4 prerequisites and credit requirements.

The white paper intends to provide understanding for stakeholders about the cost-effective contributions of roof coatings and the environmentally sound new building and renovation projects that use LEED v4. The white paper also serves as a resource, which outlines the benefits that reflective roof coatings provide to buildings, businesses and the environment. The findings in the LEED white paper apply to any reflective roof coatings that are LEED-compliant.

Bob Kobet of The Kobet Collaborative, Pittsburgh, is the author of the LEED white paper updates, as well as RRCI’s original white paper. Members of the RCMA Reflective Roof Coatings Institute, RCMA Technical Affairs Committee, and RCMA Codes and Standards Task Force collaborated on the project to update and revise the white paper to incorporate LEED’s new version.

The COP21 agreement presents a major opportunity for architects around the globe to provide leadership in designing buildings and communities that help reduce greenhouse-gas emissions. Its call for capacity building for adaptation and mitigation of climate change represents exactly what the architecture profession excels at providing,” says Russell Davidson, FAIA, AIA president, as the COP21 meeting of the United Nations Climate Change conference concluded.

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November/December 2018

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About Roofing

Roofing is a national publication that unravels, investigates and analyzes how to properly design, install and maintain a roof system. Through the voices of professionals in the field, Roofing’s editorial provides a unique perspective.